---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-26-024933"
form_type: "8-K"
ticker: "PLMK"
cik: "0002030482"
company_name: "Plum Acquisition Corp, IV"
filed_at: "2026-03-09T23:59:59+00:00"
generated_at: "2026-05-15T18:15:08.677378+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# Plum IV (PLMK) to merge with Controlled Thermal Resources at ~$4.7B enterprise value

## Summary
- CTR valued at ~$4.7B pro forma enterprise value; combined entity to list on Nasdaq as 'CTRH'.
- Hell’s Kitchen Project targets 650 MW geothermal power and 100K tonnes Li/yr at full buildout.
- Stage 1 construction includes 50 MW power and 25K tonnes lithium capacity; $185M equipment staged.
- CTR raised >$285M private capital; Conditional Use Permit and FAST-41 federal coordination secured.
- Transaction expected to close H2 2026; subject to Plum IV shareholder and regulatory approvals.

## SEC filing metadata
- accession: 0001213900-26-024933
- form_type: 8-K
- ticker: PLMK
- cik: 0002030482
- company_name: Plum Acquisition Corp, IV
- filed_at: 2026-03-09T23:59:59+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2030482/000121390026024933/0001213900-26-024933-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2030482/000121390026024933/ea0280500-8k425_plum4.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-26-024933
- JSON: https://secwatch.observer/filing/0001213900-26-024933.json
- Plain text: https://secwatch.observer/filing/0001213900-26-024933.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.